305300221 has 8 divisors (see below), whose sum is σ = 306726264. Its totient is φ = 303878400.

The previous prime is 305300201. The next prime is 305300231. The reversal of 305300221 is 122003503.

It can be written as a sum of positive squares in 4 ways, for example, as 144264121 + 161036100 = 12011^2 + 12690^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305300221 - 2¹¹ = 305298173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 305300195 and 305300204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305300201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319881 + ... + 320833.

It is an arithmetic number, because the mean of its divisors is an integer number (38340783).

Almost surely, 2^305300221 is an apocalyptic number.

It is an amenable number.

305300221 is a deficient number, since it is larger than the sum of its proper divisors (1426043).

305300221 is an equidigital number, since it uses as much as digits as its factorization.

305300221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 305300221 is about 17472.8423846837. The cubic root of 305300221 is about 673.3523387495.

Adding to 305300221 its reverse (122003503), we get a palindrome (427303724).

The spelling of 305300221 in words is "three hundred five million, three hundred thousand, two hundred twenty-one".